Fix run-level label to empty string.

Given the original commit for this was in 2018, it might be possible to
remove the label now entirely. However, when doing an upgrade it won't
not be applied, hence any clusters which are upgraded still get the
run-level. This effectively unsets it, so works for installs and
upgrades.

Signed-off-by: coops <cooper.d.mark@gmail.com>

install/0000_00_cluster-version-operator_00_namespace.yaml

@@ -9,7 +9,7 @@ metadata:
     workload.openshift.io/allowed: "management"
   labels:
     name: openshift-cluster-version
-    openshift.io/run-level: "1"
+    openshift.io/run-level: "" # specify no run-level turns it off on install and upgrades
     openshift.io/cluster-monitoring: "true"
     pod-security.kubernetes.io/enforce: privileged
     pod-security.kubernetes.io/audit: privileged